Rose plant named Bucred

ABSTRACT

A new variety of shrub rose plant having a profuse and continuous production of medium-sized flowers of bright red coloration, the plant being free branching, bushy, and erect in its growth habit and exhibiting an ability to survive Midwestern winter temperatures without weather protection. The plant also shows good field tolerance to foliar diseases such as Blackspot and Powdery Mildew.

BACKGROUND OF THE NEW PLANT

This new rose plant originated as a seedling resulting from a cross ofthe seed parent Carefree Beauty (Bucbi) (U.S. Plant Pat. No. 4,225) withan unnamed pollen parent obtained by crossing Marlena (U.S. Plant Pat.No. 2,700) with Pippa's Song (unpatented). The new variety wasdiscovered by me at Iowa State University Horticulture Greenhouses,Ames, Iowa, in 1977 and resulted from breeding efforts commenced by mein 1949 at that University. The new plant was selected for propagationbecause of its continuous and profuse production of bright red flowersand especially because of its ability to survive winter temperatures inIowa without weather protection and its notable resistance to foliardiseases. Since its discovery, this plant has been asexually reproducedby me, by budding, at Ames, Iowa, and propagated through successivegenerations to test its retention of the characteristics first observed.Continued propagation of this cultivar has demonstrated that its novelcharacteristics hold true from generation to generation and appear to befirmly fixed.

DESCRIPTION OF THE DRAWING

This new variety of rose plant is illustrated by the accompanyingphotographic drawing which, in full color, shows face and side views offully-opened flowers and several other stages of the bloom from a tightbud, to a bud with sepals just cracked, to a newly-opened flower. Thecolors shown are as nearly true as can be reasonably expected to bereproduced by conventional photographic procedures.

DESCRIPTION OF THE NEW PLANT

The following is a description, in detail, of this new variety of roseplant with color designations according to The R.H.S. Colour Chart(R.H.S.C.C.) published by The Royal Horticultural Society of London,England, in collaboration of The British Colour Council (B.C.C.), withreference in some cases to the descriptive color designations adopted bythe latter.

THE PLANT

Origin: Seedling.

Parentage:

Seed parent.--Carefree Beauty (Bucbi), U.S. Plant Pat. No. 4,225.

Pollen parent.--An unnamed variety obtained by crossing Marlena, U.S.Plant Pat. No. 2,700, with Pippa's Song (unpatented).

Classification:

Botanic.--Rosa hybrida.

Commercial.--Shrub Rose.

Form: Upright bush.

Height: About 90 to 125 cm.

Growth: Sturdy and vigorous.

Habit: Free branching and erect with strong canes and stems.

Foliage: Abundant quantity.

Leaves.--Texture: Smooth and leathery. Color: Arras Green 139A(R.H.S.C.C.) with petiole and rachis colored medium Grayed-Red 181A(R.H.S.C.C.) when young. Leaflets: 3 to 5 in number and of obovateshape.

Petioles: About 1.5 to 2 cm. in length.

Rachis: About 5.0 to 5.5 cm. in length.

Thorns and prickles: The plant lacks thorns, spines, and corms but itdoes have prickles that are about 0.7 to 1.4 cm. in length and have acoloration medium Gray-Red 181A (R.H.S.C.C.) when young, turning tolight Grayed-Red 181C (R.H.S.C.C.) with age. On old canes the pricklesare Beech Brown 165A (R.H.S.C.C.).

THE BUD

Size: Medium to medium-small in size, with a diameter of about 1.3 to1.5 cm. and a length (depth) of about 2.5 to 3.0 cm.

Form: Ovoid, long, and pointed.

Opening: The buds open slowly.

Color: Guardsman Red 45A (R.H.S.C.C.), tinted with Current Red 46A(R.H.S.C.C.) when the sepals first divide, becoming Post Office Red 45B(R.H.S.C.C.) when the petals begin to unfurl.

Sepals: The sepals are spear-shaped and stand up, but curl back as theflower opens.

Color.--Inside -- Light Medium-Green 138D (R.H.S.C.C.). Outside --Medium Green 138B (R.H.S.C.C.).

Calyx:

Shape.--Funnel-shaped, becoming globular.

Size.--Small, about 0.7 to 0.9 cm. in width and 0.9 to 1.2 cm. inlength.

Aspect.--Smooth.

Splitting.--Calyx does not split.

Peduncle:

Length.--About 7 to 14 cm. long.

Aspect.--Hairy, prickly, and slender.

Strength.--Strong.

Color.--Varies from Medium Grayed-Red 181A (R.H.S.C.C.) to Medium Green138B (R.H.S.C.C.) tinted with Medium Grayed-Red 181A (R.H.S.C.C.).

THE FLOWER

Blooming habit: Profuse and continuous from early to late season.

Size: Medium, about 7.5 to 8.5 cm. in diameter and 2 to 4.5 cm. indepth.

Borne: Singly and in clusters of 3 to 5 buds and flowers.

Shape: When bloom first opens, the flowers are cup-shaped, but formlater becomes flat with petals recurving slightly.

Petalage:

Number of petals.--12 to 18.

Arrangement.--Imbricated.

Form.--Round-obovate.

Texture.--Soft and satiny.

Color.--Outer petals are Post Office Red 45B (R.H.S.C.C.) with whiteonglets at their bases. After full bloom, the color develops a bluishtint and lightens to light Rose Bengal 57B (R.H.S.C.C.). Inside petalsare also 45B (R.H.S.C.C.), with the reverse sides of the petals beingslightly lighter, Cherry Red 45C (R.H.S.C.C.).

Petaloids:

Number.--3 to 5.

Size.--About 2 to 3 cm. long, and about 2 cm. wide.

Color.--Post Office Red 45B (R.H.S.C.C.) with white streaks.

Persistence: The petals drop cleanly after full bloom.

Fragrance: Pleasantly sweet.

Lasting quality: About 4 to 5 days on the plant and about 5 to 6 days asa cut flower. The bloom appears unaffected by wet or hot weather.

REPRODUCTIVE ORGANS

Stamens:

Anthers.--Numerous, with a length of about 0.9 to 1.1 cm. and in acircular arrangement.

Filaments.--The filaments have a length of about 0.7 to 0.9 cm. and acolor of Dresden Yellow 5B (R.H.S.C.C.).

Pollen.--The color of the pollen is Dresden Yellow 5B (R.H.S.C.C.).

Pistils.--Numerous, with a length of about 0.4 to 0.6 cm.

Stigmas.--Color is Dresden Yellow 5B (R.H.S.C.C.).

Ovaries.--Ovate with hispid achenes attached to the receptacle wall.

FRUIT

The fruit is semi-fertile and round or ovoid in form, with a color atmaturity of Burnt Orange 31B (R.H.S.C.C.).

This rose plant resembles the Floribunda Rose Plant Marlena, one of itsparents, in its floral traits, differing in appearance in its tallergrowth but profusely and consistently producing fine quality bloomssimilar to its parent. The plant is, however, exceptional in its abilityto survive under adverse winter conditions and its field tolerance tofoliar diseases such as Blackspot and Powdery Mildew.

I claim:
 1. A new and distinct variety of rose plant substantially asherein shown and described, characterized by its profuse production ofmedium-size flowers of bright red coloration, its vigorous andfree-branching growth habit, its ability to survive without protectionunder adverse winter conditions, and its resistance to foliar diseases.